Trigonometric Equations and Inequalities
AP Precalculus · Flashcards · Recall
AP PRECALCULUS · FLASHCARDS
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QUESTION
What is the general solution for
sec
(
θ
)
=
a
\text{sec}(\theta) = a
sec
(
θ
)
=
a
?
QUESTION
What is the general solution for
csc
(
θ
)
=
a
\text{csc}(\theta) = a
csc
(
θ
)
=
a
?
QUESTION
State the double angle formula for
cos
(
2
θ
)
\text{cos}(2\theta)
cos
(
2
θ
)
.
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ANSWER
cos
(
2
θ
)
=
cos
2
(
θ
)
−
sin
2
(
θ
)
\text{cos}(2\theta) = \text{cos}^2(\theta) - \text{sin}^2(\theta)
cos
(
2
θ
)
=
cos
2
(
θ
)
−
sin
2
(
θ
)
. This is the standard double angle formula for cosine.
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